Celerina's Rugs - The Ruins at Monte Albanhttp://www.celerina.com/Montealban.html
This page has a site plan of the Zapotec archaeological site of Monte Alban and shows the location of the various structures of the ancient city.

Aztec Calendar: The Pointerhttp://www.earthmatrix.com/serie02/cuad02-1.htm
This gives an illustrated explanation of the pointer of the Aztec calendar, which
functions as an indicator of the first and last days of the 260c and
365c day-count calendars.